No it wasn't difficult. I used, modified, and (re)

created. I liked ranges I understood how to manipulate them using common
denominators and limits. It was easy to play around with and see how
each range changed based on my input. Yes, I will use it in the future because
it basically reiterates what was explained in the function and provides
more precise instructions on what was manipulated

python.py

@@ -0,0 +1,21 @@
+from turtle import *
+
+def square(side_length):
+    forward(side_length)
+    right(90)
+    forward(side_length)
+    right(90)
+    forward(side_length)
+    right(90)
+    forward(side_length)
+    right(90)
+sizes = [20,40,60,80,100]
+for size in sizes:
+    square(size)
+for size in sizes:
+    square(20)
+    penup()
+    forward(40)
+    pendown()
+    input()
+    

tile.py

@@ -11,7 +11,7 @@ def draw_tile_outline(size):
 
 def draw_squiggle(size):
     forward(size/4)
-    pencolor("black")
+    pencolor("blue")
     left(90)
     quarter_arc_right(size/4)
     quarter_arc_left(size/4)

tile_grid.py

@@ -10,7 +10,9 @@ from tile import fly
 def draw_tile_grid(width, height, tile_size, tile_function):
     """Draws a (width x height) grid, with tile_function drawn on each tile.
 
-    (Your explanation here.)
+    (To draw width, moves to x origin then moves up one row to create tile size then returns to the original
+    moves to the right 90 for the width, moves to the left 90 for the height then goes back to the origin
+    and repeats)
     """
     for y in range(height):
         for x in range(width):